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In regards XXXXX XXXXX collar and set screw, I figured it was for adjusting the how far the handle can rotate, but when I took it off and tried turning the handle it still turned less than 180 degrees, the exact same radius as when the collar and set screw were on, shouldn't it have turned further?
When you say "shower cartridge", do you mean "pressure balancing unit"? Want to make sure I'm clear as to what I'm looking for.